Gas cooking-stove.



E. V. COULS'ION. GAS COOKING STOVE.

APPLICATION ULEB AUG.5,1912.

Patented Dec. 8, 1914.

2 SHEETS-SHEET 1.

MMM/Ww,

E. V. OOULSTON GAS COOKING STOVE.

APPLICATION MLBD AUG4 191 Patented Dec, 8, 191(i ATTEST INVNTOR J Earl U. Gouon, )Z 1 M4 MATTI/m UNITED lsiufriias-f.im:rENCr EARL 'vico-@Sabia C'LYFLeNDi-giof Specification-of 'Letters Yatexit.

Patente-apela. 8, 1914-.

appucauoii med August s, 1912. seran No. 713,227.

To all '1c/lonnit mag/.concern Be `it knownthat-I', EARL V. CoULs'roN, citizen of the United States, residing -at Clevelaud,.in the county of Cuyahoga and zState 'of Ohio, have invented certain new and useful Improvements in Gas Cooking- Stoves,- of which the following is a specification.

My invention relates toan improved gas cooking stove, and the improvementsconi'- prise.l the construction and arrangement of parts substantially as herein shown and described and more particularly pointed out in'ther claims.

Maf-chief objectis to provide a stove wherewith g1eat; sa\'ing of fuel may be practised during all ordinary cooking, baking'audA roasting operations. L

In. .stores in general, particularly gas vstovespfthere great waste of heat and fuel, and.' my invention is designed to ohviate thizsobjection by utilizing the waste heat .-ofkone or more burners inthe most effective manner possible at a number of ydifferent places in the stove. This I accomA plishby placing the oven and its burner and the top burners and the draft flues in new relations 'so @that the heat products from thelo'ven burner may betrapped in the oven, or passed to a central flue in the stove and directly under and beneath cooking places in the vtop l of the stove,; and also brought into the line of draft fuiftheV top burners to commingle with the lifeat products thereof when thesev burners and the oven burners are being used simultaneously. In addition, the invention also provides for the utilization of the waste heat from the top burners alone, and the oven burner alone.

YThe stove is also compactly made with the ovenin' convenient reach` at a very desirable elevation above the floor, and the walls of the oven are particularly constructed to retainv the heat in the oven. A secondI insulat'ed oven is also provided, and cooking,

baking and roasting may be accomplished.

in either yor l\oth ovens, following the now well-known methods of so-called Fireless cooking. The invention also includes means to jointly control the air and gas supply for the oven burner and the passage -of the heat products through the oven, all

`with a view to safety in operation and etliciency in results.

In the accompanying drawings, Figure l 1s afperspectlve view of my in iproved stove.

Fig. 2 is a plan view vand horizontal section on line 2 2,` Fig. 3.' Fig. 3 is a vlongitudinal section of the stove on line '3`--3, Fig.' 4,- and Fig. 4 is a cross section on line 4 4, Fig. 3. Fig.v 5 is aperspective view of the damper andtions. I

The stove 2 as shown is*l offrectangular shape,.compactly`built, and raised above the floor afoot or more by legs 3 ,ait each corner. It differs from other .stoves inthat the'top 4 overlaps the oven5'only in part and particularly in that the-top4- and the oven are brought nearer` 'together than usual to provide a very'narrowhorizontal top spaceG through which the products of combustion from the oven-burner; 7 must pass before'escapingat the box and.. pipe collar. 8-at the rear ofthe stove. vSpace 6 being thus narrowed, the outgoing heat may belocallzed and'l concentrated to good iad.-

without detrimcntk toftlie', ,Ilitufrali draft, and the oven may lalso occupy 'a higher 'fele'v'ation. in tliestoye,- lorfbe 'made'larger thanus al as wellkasfhaye'doublewalls I() spaced apart 'with "a heat-insulating material 11 placed therebetween. Heating, space 6 is also open to reg'eivevthe products of combustion of theb'iriiers 12 vlocated.incooling- `4"beneat'h top. l1lids-tlf), l.and y midway oi the top 4 at the intake side of4 space G.. i Outlet 1'6A isv at the upper enel of thief-perpendicular flue '17'wl1ich communi- Cates-` with` oven 5 at its bottom, and thisv flue..extends down and through the bottom l'S'i'of ,the stove, although subdivided horizontally by a cross strip I9 at a central point opposite an elongated opening 20 in .the oven walls. 10. The lower portion` of flue 17- provides an air intake channel leading to the burner chamber 21 beneath baille plate 22 which serves as the oven bottom and s reinforced and protected by an insulating ining 23. Plate 22 however is spaced apart from the outerV wall 10 of the oven, as is also an additional side wall 24 which terminates short of the top wall-of the. oven,

therebylprovidinga vertical draft space 25` gasvalve operating connec` to ca the heat into the top of the oven, from w ence outlet is byl way of opening 20 in the` lower vleft hand corner, assuming l"that be damper valve 26, which is rotatably mounted in the sectional box or frame Q2 Saidopenngcis@ open, or turned a quarter. from the 'positionV shown in Fig. 3. If damper valve 26 is closed as shown no escape 'of products ofpy combustion can occur freinA oven 5, nor air enter, but an open space is left between lthe damper valve and the vseat therefor at the edge ofl plate l The heat in` burner chamber 21 may therefore pass ,upward intotli 'oven 5 atV both sides and "be uniformly istributed But when the damperwalve is down all conv munication is cut .off 'between chamber 21 Aand the oven except at draft 'space 25 and the heat products must pass out through thc upper half of opening 2O into discharge Hue 17 while the fresh air for burner 7 is taken into chamber 21 through the lower half of this opening. The heat in escaping from oven 5 must necessarily cross the oven and vcome down to the bottom before entering flue 17, and then discharge directly upward into the narrow heat space 6 at'a point directly opposite the cooking holes and lids 9. The waste heat is thus applied in a direct manner and no burners are used to obstruct the narrow passage beneath this heating area. A concentrated eilect of the heat'atthese cooking openings is especiall and to further this purpose iue- 1 is .yiztically sub-divided into two channels by a v'centrally located'strip 28, see Fig. 4, and fthe space Bis also sub-divided by segmental partitions 29 conforming in partito the circular openings in the top to more 4o uniformly distribute and center the heat at both openings. Compartment 14 containing burners 12 is also sub-divided by a middlefwall 30 extending to vertical strip 28- Openings 32 (Fig. 3) are provided in outer wall 10 to supply air for burners 12 in compartment 14. The opposite wall 33 of this compartment provides one of the walls of fine 17 and it extends to within a. short' distance of top 4. Compartment 14 represents the usual space allotted for a gas burner, and it will be noted that the height and narrowness of the heat-concentrating chamber 6 Afor lids 9 is in marked contrast therewith.

Burners12 and oven burner 7 are sup- V` plied with mixed air and gas where coupled with the main pipe 34 mounted at the front of the stove, and the lplug valve 35 'which controls the iow of the gas to the oven burner is operatively connected with the damper valve 26 by short arms 36 and a link 37, see Figo. Said 'valve 35 is therefore located closely adjacent to the trun-` nion end of the damper valve, and .I may unite the two val-ves in a more direct mauner than as shown to accomplish the same result, that is, to operate the two valves jointly so that when the gas is-turned on for the burner 7 the damper valve will be opened to permit air to enter combustion chamber 21 and the products of combustion to pass out of the oven into flue 17. l'Vhen the damper valve is closed, the gas is cut ofi and there is no danger 'of trapping gases in the oven and possibility of explosions on this account. The oven burner 7 may be ig-v nited through an opening having a door 3S at the front.'

In operation, a stove pipe is preferably attached to the collar of box 8 and connected with a chimney in the usual way to create a draft and carry away the' products of combustion. VlVhen cooking with the burner 12 in the frontv end of compartment 14 the draft will cause the waste heat to ass un der the frontcooking opening and 11d 9 and `thence around its segmental partition 29 beforepassing to the rear and out of box The waste heat from the rear burner 12 will pass out likewise in respect to the rear cookingflid 9. Additional vessels can thus be heated and the contents cooked at lids 9 without burning extra gas for this purpose. The waste heat thus utilized may be supplement-ed and increased if the oven burner is in operation, as the discharge from fine 17 also enters the waste heat chamber* at the same point,-tl1at is, at 1B. Or if burners.

ing`l is being done in the oven, gas is con.

surri'ed during the entire operation. In vthis device, after the gas has been burned in the oven for about one-fourth the usual length of time, the gas can be cut off, which operation automatically' raises the damper valve and closes both the air inlet and the waste outlet to the oven, thereby retaining the heat in the oven to complete the baking or roasting operation, this result being fui ther induced by the insulated walls which prevent radiation and loss of the confined heat. I estimate that with my improved stove at least one-half of the usual amount of gas may be saved in cooking operations, and two-thirds to three-fourths saved in baking operations. The arrangement of the oven and the top in nearer relations than in other vstoves avoids extreme stooping, takes up less room, and leaves ample space below the stove for cleaning.

An extra compartment or oven 40 occupies the space beneath burner compartment 12, and the walls of this oven arealso between as in oven 5. However, as shown this compartment is a'ir ti lit and accessible from the front through a4 oor 41, and when the :food is partially cooked or baked the process may be completed by simply placing the vessel containing the food in this compartment and closing the door 41. The same steps may be followed in oven 5 but with better advantage in view of its contained burner 7. Baiile piate or false bottom 22 may be made a removable part of the oven and taken out through front door 42, and in this event may be replaced by an open rid or the like. The usual runners or le ges 43 for racks (not shown) are also used within oven 5.

W hat I claim is:

l. In a stove, an oven having a burner, a shallow cooking chamber on the top of said oven, a waste-heat draft flue between said oven and chamber, and means to control both the intake of air into said oven and the outflow of waste-heat therefrom through said flue.

2. In a stove, an oven having double walls with heat insulating material therebetween, a burner in said oven and a baffle plate above the same, an opening in the walls of said oven, and a single valve at said opening to control both the intake of air for said burner and the outflow of waste-heat from said oven.

3. A stove having an oven and a burner compartment and burners therein, a top above said compartment overlapping said oven and spaced apart therefrom to provide a shallow heating chamber, a divided iue for said oven located at the same side thereof as said compartment and open to said ehamber, and a damper valve for said flue to control the draft through the divisional parts of said fiue.

4. In a stove, a burner compartment and an oven and burners therefor and a top overlapping said oven to provide a shallow cooking chamber and waste-heat draft passage, said top having cooking openings and said chamber having division walls partly surrounding said openings, a vertically-divided draft flue open to said chamber between said oven and the said compartment, and la. damper valve for said flue:

5; In a-stove, an oven having a burner in its bottom and a bathe plate above the same, and said oven provided with a vertical passage at one side to cause the products of combustion from the burner to pass into the upper part of the oven and the wall. of the oven having an opening opposite the edge of the said batile plate, and a damper valve for said opening, the said vertical passage being located at a substantial distance from the said opening in the wall of the oven.

G. A stove having a burner compartment at its top and an oven at one side thereof and spaced apart therefrom by a vertical flue, a top for said stove slightly raised above said oven to provide a shallow cooking chamber open to said vertical flue, said flue having a horizontal division strip near its bottom end and an elongated opening in 'the wall of said oven opposite said strip, a

false bottom in said oven centrally opposite said opening, a damper in said opening, and burners for said top compartment and the oven.

7 A stove having two compartments with insulated walls and a vertical draft fiue from top to bottom of the stove separating said compartments, a top overlapping both conipartments, and spaced apart therefrom to provide a shallow waste-heat passage and sup lemeiital cooking chamber, a horizontal division strip in said draft iue, an opening opposite said strip in the wall of one of said compartments, a damper valve for said opening to control the intake of air into one compartment and also the outflow of waste heat therefrom, and a gas burner for the valved compartment.

8. A stove having two compartments with double walls and insulating material therebetween, a top burner compartment, a raised top overlying said compartment to provide a shallow waste-heat passage and supplemental cooking chamber, a vertical draft flue between said compartments open to said chamber and to the bottom of the stove, a horizontal dividing strip for said flue, an opening opposite said strip in the double wall of one crnnpartnient, a false bottom in said compartment opposite said opening, a damper valve in said opening. and burners for said top compartment and the damper valved compartment.

In testimony whereof I affix my signature in presence of two Witnesses.

F. H. ZwiLLiNG, E. M. Fisiinn. 

